On Wed, 21 Aug 2013 12:26:51 +0200 Frank Mehnert <frank.mehn...@oracle.com> wrote:
> On Wednesday 21 August 2013 12:06:08 Stephan von Krawczynski wrote: > > From my current experience with former vbox versions and several qemu > > versions I can tell you that you won't improve vbox network performance if > > you don't implement multiqueuing. _Exactly that_ makes the difference in > > latency and throughput performance. > > This is a bold message. Implementing multiqueuing will perhaps help > but so far we know a couple of places which need optimizing. 4.3 will > address some places, later versions will address more. At the moment > we do much too many context changes for high-traffic operations like > networking so this is the first place we started optimizing. The final > results will show how successul these optimizations were. > > Kind regards, > > Frank Dear Frank, I know it sound a bit strange, but I really try to help you focus on what is worth working on. I can tell you for sure that you cannot beat kvm/qemu in terms of networking currently because vhost_net does zero-copy networking and multiqueues. And I saw the difference in production. It is huge. Whatever you improve in other fields it will not allow to come close to these to points. It simply makes a difference to copy a GB datastream once instead of null times. And for the scheduling/multitasking multiqueuing on vcpu basis is not beaten either. If you see the figures you can't even tell that its a virtualised guest system. VBox windows guest additions are very good, disk performance on linux guest is very good, almost everything you can handle in userspace is quite ok (besides the front-end btw as you cannot see any performance figures in the guest list like in virt-manager, or cpu pinning). But not networking for servers. -- Regards, Stephan ------------------------------------------------------------------------------ Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk _______________________________________________ VBox-users-community mailing list VBox-users-community@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/vbox-users-community _______________________________________________ Unsubscribe: mailto:vbox-users-community-requ...@lists.sourceforge.net?subject=unsubscribe
